1,063 Answered Questions for the topic Pre-Calculus

Pre Calculus Calculus Ap Calculus

11/21/17

Can you help me with this Pre-Calculus Problem?
How do I find the number of real zeros for the function f (x)= x^3-2x^2-8x?
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Pre Calculus

11/15/17

Carbon dating
Half life radioactive decay dating.    Prehistoric cave paintings were discovered in France. The paint contained 7% of the original carbon-14. The half-life of carbon-14 is 5730 years. How old... more
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Pre Calculus

11/12/17

Write answer as a complex number in standard form
(-6 +5i)(-2+3i)
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Pre Calculus

11/08/17

1+sin X = 2cos^2 X
how do I solve this?
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Pre Calculus

11/06/17

If π is less than or equal to θ, which is less than or equal to 2π and cosθ=cos1, what is the value of θ? Round your answer to the nearest hundredth.
If π is less than or equal to θ, which is less than or equal to 2π and cosθ=cos1, what is the value of θ? Round your answer to the nearest hundredth.
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Pre Calculus

11/03/17

A chemist has two solutions of HClHCl. One has a​ 40% concentration and the other has a​ 25% concentration How many liters of each solution must be mixed to o
A chemist has two solutions of HClHCl. One has a 40% concentration and the other has a 25% concentration. How many liters of each solution must be mixed to obtain 61 liters of a 33% solution?
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Pre Calculus

10/31/17

A squirrel population was introduced in a county 30 years ago. Doubles every 6 years, and is now 60,000. What will the population be after 10 years from now?
Initial population size= 1875 (30 years ago) 60000*2= 120,000 (6 years from now) 120,000*2= 240,000 (12 years from now) Question is 10 years from now so how do I find between that?
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Pre Calculus

10/31/17

log(x)+log(2x-3)=log(2x+3)........ solve, dont forget to check?
i am super confused with this problem could anyone please help...
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10/25/17

If $3,500 is invested at an interest rate of 6.25% per year compounded continuously, find the value of the investment after
A.) 3 years
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Pre Calculus Math Graphing Ap Calculus

10/22/17

How do I write the function form y=f(x) for each set of conditions?
A. Verticle asymtote at x=1, hole at x=0   holes at x=-1 and x=0, resembles y=x^2
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Pre Calculus Math Calculus Graphing

10/22/17

How do I find the asymptotes of a function?
How do I find the asymtotes of the functions   y=x/x^2+2x+1   y=x-1/x^5-4x^3   y=5x^2-10x+1/x/2
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Pre Calculus Math Calculus Ap Calculus

10/20/17

How do I create a form of y=f(x) that satisfies each set of conditions. Can someone please help?
How do I create a form of y=f(x) that satisfies each set of conditions:   A. Verticle asymptote at x=4, hole at x=0   B. Verticle asymtotes at x=-5 and x=1, hole at x= -1   C. Holes at x=3... more
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10/20/17

How are each of these equations different from the parent graph?
y=1/x^2   A. y=1/x^2+3   B. y=1/(x+9)^2   C. y=1/(x+5)^2-1   E. y= -1/(x-2)
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10/15/17

Word Problem
Beth has 230ft of fencing available to make a rectangle enclosed in an open field. The enclosure needs to have an area of 3000ft^2. If she has to use all 230ft of fencing, what dimensions should... more
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10/14/17

Pre-Calc Help!
The spreag from of oil leaking from a tanker is in the shape of a circle. If the radius r (in feet) of the spread after t hours is r(t) = 200sqt(t), find the area A of the oil slick as a function... more
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Pre Calculus

10/13/17

make a polynomial function of the smallest degree that cosses the x-axis at -1 and 4, touches the x-axis at 0 and 2, and goes through the point (1,3)
Make a polynomial function of the smallest degree that has the following characteristics: cosses the x-axis at -1 and 4, touches the x-axis at 0 and 2, and goes through the point (1,3).
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09/24/17

find the roots of the polynomial equation 5x^2-6x+9=0, and cube roots of 5x^3-6x+9=0
I tried solving this using quadratic equation but I am unsure if I am following the right path. Thank you 
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Pre Calculus

09/22/17

Find an explicit quadratic polynomial =ax^2 +bx + c that has three roots.
I am looking to solve this extra credit problem. 
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Pre Calculus

09/20/17

Find an equation for a polynomial of degree 4 with the following properties: zeros at x=3,x=7 and x=−2. f(0)=4116. f(x)>0 only on the interval (−2,3)
I understand how to do the question by the first two properties, I just don't get the third. Any help would be appreciated. Thanks!
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Pre Calculus

09/14/17

The area (in ft2) of a rectangle that is eight times as long as it is wide; w = width of the rectangle (in ft)
This is a pre-cal problem. I need to express its given quantity in terms of the indicated variable.
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Pre Calculus

09/13/17

Prove for two parallel lines that the slopes are equal?
This is an extra credit question. I am trying to see if someone can give me mathematical explanation how?
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Pre Calculus College Algebra

09/12/17

Determine whether the equation defines y as a function of x.
a) x2 + y = 25 b) x + y2 = 25 c) x = y3
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09/12/17

Write piecewise function T(x), then calculate T(2), T(3), and T(5)
A hotel chain charges $75 each night for the first two nights and $50 for each additional night’s stay. Thetotal cost function T is a function of the number of nights x that a guest stays. Write... more
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Pre Calculus College Algebra

09/12/17

Find Domain and give answer in interval notation
2. Find the domain of the following function, and give the answer in interval notation:                     √x h(x)=    ________           x2 + 8x + 15
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Pre Calculus College Algebra

09/12/17

Write an equation, find constant proportionally, and how much the printing cost will be for 5000 copies of 92 pg magazine
1. Printing Cost: The cost C of printing a magazine is jointly proportional to the number of pages p inthe magazine and the number of magazine m printed.a) Write an equation that expresses this... more
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